chore: add more options to example Postgres clusters (#10)

Closes #9

Signed-off-by: Gabriele Bartolini <[email protected]>

examples/eu/cluster-dc-eu.yaml → examples/eu/pg-eu.yaml

@@ -1,13 +1,18 @@
 apiVersion: postgresql.cnpg.io/v1
 kind: Cluster
 metadata:
-  name: cluster-dc-eu
+  name: pg-eu
 spec:
   instances: 3
 
   storage:
     size: 1Gi
 
+  # See https://cloudnative-pg.io/documentation/current/storage/#volume-for-wal
+  walStorage:
+    size: 1Gi
+
+  # See https://cloudnative-pg.io/documentation/current/scheduling/#isolating-postgresql-workloads
   affinity:
     nodeSelector:
       node-role.kubernetes.io/postgres: ""
@@ -19,6 +24,27 @@ spec:
     topologyKey: kubernetes.io/hostname
     podAntiAffinityType: required
 
+  # See https://cloudnative-pg.io/documentation/current/bootstrap/#bootstrap-an-empty-cluster-initdb
+  bootstrap:
+    initdb:
+      dataChecksums: true
+
+  postgresql:
+    # See https://cloudnative-pg.io/documentation/current/postgresql_conf/#the-postgresql-section
+    parameters:
+      # Some very basic Postgres settings
+      max_connections: '100'
+      log_checkpoints: 'on'
+      log_lock_waits: 'on'
+      pg_stat_statements.max: '10000'
+      pg_stat_statements.track: 'all'
+      hot_standby_feedback: 'on'
+      # Note: `remote_apply` slows down write operations
+      synchronous_commit: 'remote_apply'
+      # Container images work fine with sysv shared memory
+      shared_memory_type: 'sysv'
+      dynamic_shared_memory_type: 'sysv'
+
   backup:
     barmanObjectStore:
       destinationPath: s3://backups/
@@ -33,15 +59,16 @@ spec:
       wal:
         compression: gzip
 
+  # See https://cloudnative-pg.io/documentation/current/replica_cluster/#distributed-topology
   replica:
-    self: cluster-dc-eu
-    primary: cluster-dc-eu
-    source: cluster-dc-us
+    self: pg-eu
+    primary: pg-eu
+    source: pg-us
 
   externalClusters:
-  - name: cluster-dc-eu
+  - name: pg-eu
     barmanObjectStore:
-      serverName: cluster-dc-eu
+      serverName: pg-eu
       destinationPath: s3://backups/
       endpointURL: http://minio-eu:9000
       s3Credentials:
@@ -53,9 +80,9 @@ spec:
           key: ACCESS_SECRET_KEY
       wal:
         compression: gzip
-  - name: cluster-dc-us
+  - name: pg-us
     barmanObjectStore:
-      serverName: cluster-dc-us
+      serverName: pg-us
       destinationPath: s3://backups/
       endpointURL: http://minio-us:9000
       s3Credentials:
@@ -68,13 +95,14 @@ spec:
       wal:
         compression: gzip
 ---
+# See https://cloudnative-pg.io/documentation/current/backup/#scheduled-backups
 apiVersion: postgresql.cnpg.io/v1
 kind: ScheduledBackup
 metadata:
-  name: cluster-dc-eu-backup
+  name: pg-eu-backup
 spec:
   schedule: '0 0 0 * * *'
   backupOwnerReference: self
   cluster:
-    name: cluster-dc-eu
+    name: pg-eu
   immediate: true

examples/us/cluster-dc-us.yaml → examples/us/pg-us.yaml

@@ -1,13 +1,18 @@
 apiVersion: postgresql.cnpg.io/v1
 kind: Cluster
 metadata:
-  name: cluster-dc-us
+  name: pg-us
 spec:
   instances: 3
 
   storage:
     size: 1Gi
 
+  # See https://cloudnative-pg.io/documentation/current/storage/#volume-for-wal
+  walStorage:
+    size: 1Gi
+
+  # See https://cloudnative-pg.io/documentation/current/scheduling/#isolating-postgresql-workloads
   affinity:
     nodeSelector:
       node-role.kubernetes.io/postgres: ""
@@ -19,6 +24,27 @@ spec:
     topologyKey: kubernetes.io/hostname
     podAntiAffinityType: required
 
+  # See https://cloudnative-pg.io/documentation/current/recovery/
+  bootstrap:
+    recovery:
+      source: pg-eu
+
+  postgresql:
+    # See https://cloudnative-pg.io/documentation/current/postgresql_conf/#the-postgresql-section
+    parameters:
+      # Some very basic Postgres settings
+      max_connections: '100'
+      log_checkpoints: 'on'
+      log_lock_waits: 'on'
+      pg_stat_statements.max: '10000'
+      pg_stat_statements.track: 'all'
+      hot_standby_feedback: 'on'
+      # Note: `remote_apply` slows down write operations
+      synchronous_commit: 'remote_apply'
+      # Container images work fine with sysv shared memory
+      shared_memory_type: 'sysv'
+      dynamic_shared_memory_type: 'sysv'
+
   backup:
     barmanObjectStore:
       destinationPath: s3://backups/
@@ -33,19 +59,16 @@ spec:
       wal:
         compression: gzip
 
-  bootstrap:
-    recovery:
-      source: cluster-dc-eu
-
+  # See https://cloudnative-pg.io/documentation/current/replica_cluster/#distributed-topology
   replica:
-    self: cluster-dc-us
-    primary: cluster-dc-eu
-    source: cluster-dc-eu
+    self: pg-us
+    primary: pg-eu
+    source: pg-eu
 
   externalClusters:
-  - name: cluster-dc-eu
+  - name: pg-eu
     barmanObjectStore:
-      serverName: cluster-dc-eu
+      serverName: pg-eu
       destinationPath: s3://backups/
       endpointURL: http://minio-eu:9000
       s3Credentials:
@@ -57,9 +80,9 @@ spec:
           key: ACCESS_SECRET_KEY
       wal:
         compression: gzip
-  - name: cluster-dc-us
+  - name: pg-us
     barmanObjectStore:
-      serverName: cluster-dc-us
+      serverName: pg-us
       destinationPath: s3://backups/
       endpointURL: http://minio-us:9000
       s3Credentials:
@@ -72,13 +95,14 @@ spec:
       wal:
         compression: gzip
 ---
+# See https://cloudnative-pg.io/documentation/current/backup/#scheduled-backups
 apiVersion: postgresql.cnpg.io/v1
 kind: ScheduledBackup
 metadata:
-  name: cluster-dc-us-backup
+  name: pg-us-backup
 spec:
   schedule: '0 0 0 * * *'
   backupOwnerReference: self
   cluster:
-    name: cluster-dc-us
+    name: pg-us
   immediate: true